Combined middlings-purifier and dust-collector



(No Model.) 3 Sheets-Sheetl.

A. N. WOLF.

COMBINED MIDDLINGS PURIFIER AND DUST GOLLEOTOR.

' Patented Dec. 20,1881;

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(No Model.) 3 Sheets-Sheet 2.

A. N. WOLF.-

' COMBINED MIDDLINGS PURIFIER AND DUST GOLLEGTOR.

No. 251,331. Patented Do. 20,1881.

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(No Model.) 3 Sheets-Shet a.

-. A. N. WOLF.

COMBINED MIDDL'INGS PURIFIER AND DUST COLLECTOR.

No. 251,331 I Patented De0.'20,1881.

UNITED STATES PATENT 7 OFFICE.

ABRAHAM N. WOLF, OF ALLENTOWN, PENNSYLVANIA.

COMBINED MlDDLlNGS-PURIFIER AND DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent N 0. 251,331, datedDecember 20, 1881 Application filed May 16, 1881. (No model.)

To all whom it may concern:

7 Be it known that I, ABRAHAM N. WOLF, of Allentown, in the county ofLehigh and State of Pennsylvania, have invented certain new and usefulImprovements in aOombined Middlings-Purifier and Dust-0olleetor; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use it, reference being had to theaccompanying drawings, which form part of this specification.

My invention relates to an improvement in a combined middlings-purilierand dust-collector; and it consists, first, in a series of adjustableslats, which are placed in the top of the frame, and which can be movedtogether so as to cause the blast ofair to move a greaterdistance overthe top of the upper screen, or pulled apart so that the air can passfreely between them; second, in the combination ofthe screens, a seriesof slats fastened togetherand arranged in relation to the air-passage,the dust-collector, and the suction-fan, all of which will be more fullydescribed hereinafter.

Figure 1 is a vertical longitudinal section of my invention. Fig. 2 is avertical cross-section of the same. Fig. 3 is a detail view of thepitman. Fig. 4 is a vertical cross-section of the lower portion of thelower screen. Figs. 5 and 6 are detail views of the series of slats; andFig. 7 is a side elevation of my invention complete.

A represents a frame, of any desired length and shape, upon the top ofwhich is placed a hopper, B, into'gwhich the ground grain is poured, andwhich is distributed evenly over the upper end of the upper screen, 0,by means of the two inclines D, which can be so adjusted that a portionor all of the grain will drop through between their upper ends, or whichcan be closed together at their upper ends, so that the whole of theground grain can be made to fall only atthe sides of the screen and noneat the center, as may be desired. This screen 0 has suitableprojections,E,extendingdownward from its inner end, and to theseprojections are fastened connecting-rods F, which have their outer endsfastened to the cranks formed on the outer ends of the fan-shaft G.

This fanshaft is driven by a belt, H, from the driving-wheel I, which isjournaled upon the top of the frame. As the driving-wheel is revolvedthe fan is also revolved, and as the fan revolves the two screens 0 J,which are united together by the rocking levers K, are made to vibrate,so as to thoroughly sift the ground grain upon their tops. The levers Kmove the screens in one direction, and they are then returned toposition again by means of the springs T, which have their upper endsfastened to the inside of the frame and their lower ends to the top ofthe frame of the lower screen, J, as shown in Fig. 1. Under the upperscreen is placed a suitable trough or receptacle, into which themiddlings drop, and from the end of this trough they pass into areceptacle, M, prepared for them at the opposite end of the frame fromthe fan. All of the coarser middlings pass from the lower end of theupper screen down upon the lower screen, J, and all that pass throughthe, lower screen are collected in a second trough or receptacle, N,formed to receive them. Through the bottom of this receptacle are formedanumber of openings,which are closed by means of suitable slats, andthrough which the contents of the trough can be drawn at any time. Theair is drawn in by the suction of the fan through the end or sides ofthe frame, as shown in Figs. 1 and 2, just under the screens, and whichair passes up through the screens, carrying the dust either up towardthe slats or the dust-collector. There being a much greater quantity ofdust arising from the upper screen, and it being desired to control thedirection of these currents toward the airpassage 0, suitable means areprovided for that purpose. The dust from the lower screens is drawndirectly toward the dust-collector P.

In the top of the frame are placed a number ofmovableslats, K, by theadjustmentofwhich the air can be taken directly from over the top of theouter end of the screen, or the air can be made to pass down toward theinner end of the screen before it is admitted to the air-passage, as maybe found necessary. When the slats K are pressed closely together by therod 3, which is secured rigidly to the outer one, the air can passbetween them, and so must pass down toward the end of the frame, atwhich the rocking levers K are placed, before it can enter theair-passage 0. As these slats are loosely connected together by the cordor cords 2, they can be drawn apart, as shown by solid lines in Fig. 1,so that the air can pass freely into the air-passage O at all parts, andhence does not have to move so far, if at all, over the. top surface ofthe screen 0. In order to separate the slats the rod or lever 3 ispulled outward, and the cords 2 connecting the slats together, and therod being fastened to the outer slat, the slides are pulled apart, asshown in Figs. 1 and 6. When it is desired to close the slats together,as shown in Fig. 5, the rod 3 is forced inward and the outer slat movedalong until its inner edge strikes the slat next to it, and which, inturn, is pushed along until it strikes the slat next to it, and so onuntil it strikes the inner one.

Having thus described my invention, I claim- 1. In a middlings-purifier,the combination.

of a series of slats, K, which are united together by means of the cords2, and adapted to be'dr'awn apart, so as to letJthe air pass directlyinto the passage 0, or closed together, so as to make the air enter thepassage from one end, substantially as shown.

2. In a middlings-purifier, the combination of the screens 0 J, theslats K, fastened to; gether and arranged in the relation and for thepurpose described to the air-passage O, the dust-collector P, arrangedin the form of a zigzag, and the suction-fan G, the screens and thedust-collector being made to vibrate, substantially as described.

-1n testimony whereof I affix my signature in presence of two witnesses.

ABRAHAM N. WOLF.

WVitnesses:

J. FRED. WEINsIIEIMER, GEO. S. RUHE.

